Carbon nanotubes and metalloporphyrins and metallophthalocyanines-based materials for electroanalysis

We discuss here the state of the art on hybrid materials made from single (SWCNT) or multi (MWCNT) walled carbon nanotubes and MN4complexes such as metalloporphyrins and metallophthalocyanines. The hybrid materials have been characterized by several methods such as cyclic voltammetry (CV), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and scanning electrochemical microscropy (SECM). The materials are employed for electrocatalysis of reactions such as oxygen and hydrogen peroxide reduction, nitric oxide oxidation, oxidation of thiols and other pollutants.

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Synthesis and Characteristics of Hierarchical Nanostructure Fe3O4 Coated Multi-Walled Carbon Nanotubes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.926-930.258 ◽

2014 ◽

Vol 926-930 ◽

pp. 258-261

Author(s):

Jing Heng Deng ◽

Kan Ping Yu ◽

Jian Guo Xie

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Photoelectron Spectroscopy ◽

Solvothermal Process ◽

X Ray ◽

Hierarchical Nanostructure ◽

Transmission Electron ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes ◽

Scanning Electron

Hierarchical nanostructure Fe3O4/multi-walled carbon nanotubes (Fe3O4/MWCNTs) were prepared by solvothermal process using acid treated MWCNTs and iron acetylacetonate in ethylene glycol as reduction reagent. The materials were characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET). The results showed that petal-like hierarchical Fe3O4 grew on MWCNTs and the Fe3O4 nanoparticles had diameters in the range of 55-110 nm. It was a facile approach to grow hierarchical nanoFe3O4.

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Electroless Synthesis of 1.4 nm Pd and Pt Nanoparticles on Self-Assembled Rosette Nanotubes

MRS Proceedings ◽

10.1557/opl.2011.69 ◽

2011 ◽

Vol 1301 ◽

Cited By ~ 1

Author(s):

Rahul Chhabra ◽

Hicham Fenniri

Keyword(s):

Electron Microscopy ◽

Photoelectron Spectroscopy ◽

Pt Nanoparticles ◽

Hierarchical Organization ◽

X Ray ◽

Force Microscopy ◽

Rosette Nanotubes ◽

Atomic Force ◽

Transmission Electron ◽

Self Assembled

ABSTRACTElectroless synthesis and hierarchical organization of 1.4 nm Pd and Pt nanoparticles (NPs) on self-assembled Rosette Nanotubes (RNTs) is described. The nucleated NPs are nearly monodisperse and reveal supramolecular organizations guided by RNT templates. Interestingly, the narrow size distribution is attributable to unique templating behavior of RNTs. The resulting metal NP-RNT composites were characterized by Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). X-ray Photoelectron Spectroscopy (XPS) was also performed to confirm the nature and composition of RNT-templated NPs.

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Ultrashort Pulsed Laser Ablation of Magnesium Diboride: Plasma Characterization and Thin Films Deposition

Journal of Nanomaterials ◽

10.1155/2015/596328 ◽

2015 ◽

Vol 2015 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Angela De Bonis ◽

Agostino Galasso ◽

Antonio Santagata ◽

Roberto Teghil

Keyword(s):

Electron Microscopy ◽

Photoelectron Spectroscopy ◽

Optical Emission ◽

Silicon Substrates ◽

X Ray Diffraction ◽

Laser Target ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Transmission Electron

A MgB2target has been ablated by Nd:glass laser with a pulse duration of 250 fs. The plasma produced by the laser-target interaction, showing two temporal separated emissions, has been characterized by time and space resolved optical emission spectroscopy and ICCD fast imaging. The films, deposited on silicon substrates and formed by the coalescence of particles with nanometric size, have been analyzed by scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, micro-Raman spectroscopy, and X-ray diffraction. The first steps of the films growth have been studied by Transmission Electron Microscopy. The films deposition has been studied by varying the substrate temperature from 25 to 500°C and the best results have been obtained at room temperature.

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Facile Synthesis of Highly Conductive Vanadium-Doped NiO Film for Transparent Conductive Oxide

Applied Sciences ◽

10.3390/app10165415 ◽

2020 ◽

Vol 10 (16) ◽

pp. 5415

Author(s):

Ashique Kotta ◽

Hyung Kee Seo

Keyword(s):

Electron Microscopy ◽

Nickel Oxide ◽

Photoelectron Spectroscopy ◽

Transparent Conductive Oxide ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Transmission Electron ◽

Conductive Oxide ◽

P Type

Metal-oxide-based electrodes play a crucial role in various transparent conductive oxide (TCO) applications. Among the p-type materials, nickel oxide is a promising electrically conductive material due to its good stability, large bandgap, and deep valence band. Here, we display pristine and 3 at.%V-doped NiO synthesized by the solvothermal decomposition method. The properties of both the pristine and 3 at.%V:NiO nanoparticles were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD), Raman spectroscopy, ultraviolet–visible spectroscopy (UV–vis), and X-ray photoelectron spectroscopy (XPS). The film properties were characterized by atomic force microscopy (AFM) and a source meter. Our results suggest that incorporation of vanadium into the NiO lattice significantly improves both electrical conductivity and hole extraction. Also, 3 at.%V:NiO exhibits a lower crystalline size when compared to pristine nickel oxide, which maintains the reduction of surface roughness. These results indicate that vanadium is an excellent dopant for NiO.

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DISPERSITY AND STABILITY MEASUREMENT OF FUNCTIONALIZED MULTIWALLED CARBON NANOTUBES IN ALCOHOLS

Modern Physics Letters B ◽

10.1142/s0217984908017102 ◽

2008 ◽

Vol 22 (25) ◽

pp. 2493-2501 ◽

Cited By ~ 4

Author(s):

HUN-SIK KIM ◽

MINSUNG KANG ◽

WON-IL PARK ◽

DON-YOUNG KIM ◽

HYOUNG-JOON JIN

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Photoelectron Spectroscopy ◽

Multiwalled Carbon ◽

Force Microscopy ◽

Atomic Force ◽

Transmission Electron ◽

Stability Measurement ◽

The Stability

Multiwalled carbon nanotubes (MWCNTs) were dispersed in various alcohols such as methanol, ethanol and isopropanol using ultrasonication. In order to disperse the MWCNTs in the alcohols, they were treated using a mixture of H 2 SO 4 and HNO 3 (3 : 1, vol/vol). The concentration of MWCNTs was approximately 0.03 wt.% and they formed a homogeneous dispersion in the alcohol solutions. The functional groups introduced on the surface of the MWCNTs during the acid treatment were characterized by Fourier transform-infrared spectroscopy and X-ray photoelectron spectroscopy. The dispersibility of the MWCNTs in the alcohols was characterized using atomic force microscopy, scanning electron microscopy and transmission electron microscopy. The stability of the MWCNT dispersions was also measured using a recently developed optical analyzer (Turbiscan).

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Thermal Degradation and Combustion Behaviors of Polyethylene/Alumina Trihydrate/Graphene Nanoplatelets

Polymers ◽

10.3390/polym11050772 ◽

2019 ◽

Vol 11 (5) ◽

pp. 772 ◽

Cited By ~ 1

Author(s):

Chunfeng Wang ◽

Jihua Wang ◽

Zhenlong Men ◽

Yongliang Wang ◽

Zhidong Han

Keyword(s):

Electron Microscopy ◽

Photoelectron Spectroscopy ◽

Expanded Graphite ◽

Graphene Nanoplatelets ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Transmission Electron ◽

Combustion Behaviors ◽

Alumina Trihydrate

Graphene nanoplatelets (GNPs) were prepared from expanded graphite (EG) with fully exfoliated structure via ball milling coupled with ultrasonication. The structure of multi-layered GNPs was characterized with transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic force microscopy (AFM) and Raman spectroscopy. By compounding alumina trihydrate (ATH) with GNPs, the well dispersed mixture of ATH/GNP was obtained, and it showed high flame retardant effectiveness in polyethylene (PE). The peak heat release rate (peak-HRR) decreased by 20% was proven by a cone calorimeter with the addition of GNPs as low as 0.2 wt % in PE/ATH. The results of thermogravimetric analysis (TG) illustrated the improved thermal stability and lower weight loss rate of PE/ATH/GNP than PE/ATH. A protective char with GNPs was evidenced by SEM and X-ray photoelectron spectroscopy (XPS). The well exfoliated structure and good dispersion of GNPs accounted for the formation of effective barrier, which made a profound contribution to the enhanced flame retardancy.

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Metal Coated Functionalized Single-Walled Carbon Nanotubes for Composites Application

Materials Science Forum ◽

10.4028/www.scientific.net/msf.561-565.655 ◽

2007 ◽

Vol 561-565 ◽

pp. 655-658 ◽

Cited By ~ 3

Author(s):

Qiang Zeng ◽

Jennifer Luna ◽

Y. Bayazitoglu ◽

Kenneth Wilson ◽

M. Ashraf Imam ◽

...

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Metal Composite ◽

X Ray ◽

Single Walled Carbon ◽

Transmission Electron ◽

Nucleation Sites ◽

Metal Composite Materials ◽

Walled Carbon Nanotubes

This study is considered as a method for producing multifunctional metal composite materials by using Single-walled Carbon Nanotubes (SWNTs). In this research, various metals (Ni, Cu, Ag ) were successfully deposited onto the surface of SWNTs. It has been found that homogenous dispersion and dense nucleation sites are the necessary conditions to form uniform coating on SWNTs. Functionalization has been applied to achieve considerable improvement in the dispersion of purified single-walled carbon nanotubes. A three-step electroless plating approach was used and the coating mechanism is described in the paper. The samples were characterized by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and energy-dispersive X-ray spectroscopy (EDX). The application of coated SWNTs in Titanium will be discussed in this paper.

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Curcumin delivery by modified biosourced carbon-based nanoparticles

Nanomedicine ◽

10.2217/nnm-2021-0225 ◽

2022 ◽

Author(s):

Hossein Danafar ◽

Marziyeh Salehiabar ◽

Murat Barsbay ◽

Hossein Rahimi ◽

Mohammadreza Ghaffarlou ◽

...

Keyword(s):

Photoelectron Spectroscopy ◽

Free System ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Transmission Electron ◽

Good Biocompatibility ◽

Drug Free ◽

Mcf 7 ◽

Carbon Based

Aim: To prepare a novel hybrid system for the controlled release and delivery of curcumin (CUR). Methods: A method for the ultrasound-assisted fabrication of protein-modified nanosized graphene oxide-like carbon-based nanoparticles (CBNPs) was developed. After being modified with bovine serum albumin (BSA), CUR was loaded onto the synthesized hybrid (labeled CBNPs@BSA–CUR). The structure and properties of the synthesized nanoparticles were elucidated using transmission electron microscopy (TEM), atomic force microscopy (AFM), ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR) and x-ray photoelectron spectroscopy (XPS) methods. Results: CBNPs@BSA–CUR showed pH sensitivity and were calculated as controlled CUR release behavior. The drug-free system exhibited good biocompatibility and was nontoxic. However, CBNPs@BSA–CUR showed acceptable antiproliferative ability against MCF-7 breast cancer cells. Conclusion: CBNPs@BSA–CUR could be considered a highly promising nontoxic nanocarrier for the delivery of CUR with good biosafety.

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